Mobile operates brings new tariff plans and offers each day. But for a customer, it’s impossible to switch between different mobile carriers for interesting plans and issues related to services. MNP( Mobile Number Portability ) is a service that helps the customer to change to their favorite mobile operator without changing phone number. Talks on implementation Mobile Number Portability in India began almost two years back. Now the service is almost ready to be rolled out. As per Department Of Telecom (DOT), MNP service in India will be launched by the end of December in some selected cities and networks. Customers in the supported network would be able to keep their mobile number moving to a new network. There will be small activation time and charge associated with this switching.